The characters of Offspring, an Australian drama television series are created by Debra Oswald with John Edwards and Imogen Banks.
In the second season, Nina enters a short relationship with a more junior doctor, obstetric registrar Fraser King (Jay Ryan).
Later in Season 2, Nina meets Dr. Patrick Reid, an anaesthetist with a troubled past, and best friend of director of obstetrics, Dr. Martin Clegg.
Season 3 sees Nina happily in love with Patrick, when her apartment is destroyed by fire, and shortly afterward, she discovers that she is not biologically related to the man she knows as her father.
She starts seeing single dad Thomas, who is later revealed to still be married when his heavily pregnant wife arrives in an emergency to St. Francis.
Billie Proudman (played by Kat Stewart) is Nina's boisterous older sister, she is bold, brassy, and incapable of lying.
At constant war with Nina's golden girl image within the family, Billie, who was once the wild child, is determined to put her wayward youth behind her, and become something great.
In Series 4, letting go her dream of starting a family with husband Mick, Billie sets out to prove herself professionally by taking over Darcy's real estate business.
Billie moves to the UK to manage Mick's tour, but returns to Melbourne at the start of Season 6 to be with the family in the aftermath of Darcy's death.
As the urging of her co-worker Kerry Green, Billie starts building a sex wall, but one of her bricks winds up being Dan.
At the start of the fourth series, nervous first-time parents Jimmy and Zara bring their son Alfie home from hospital.
Mick has finally realised his dream to become a full-time musician and his collaboration with Rosanna Harding has continued to grow and make an impact on the indie music scene.
After the birth of Darcy's son Ray, Geraldine explored new romantic territory but soon found herself back in her husband's arms.
Geraldine, along with everyone else, is rocked by Darcy's death at the beginning of Season 6, and even more so after discovering he had fathered a son with her friend and neighbour Marjorie, during a marriage separation.
He was never the type of man who could settle down forever with one person, loving women is too much a part of who he is, and hence Geraldine and Darcy have been separated for some time.
Darcy's the proud father of Ray, born from a cruise ship fling with Cherie, his daughter Nina's friend and workmate.
The popular girl at high school, Zara has grown into a hardnosed woman who knows how to play the game and always keeps part of herself separate.
At the start of the fourth series, nervous first-time parents Jimmy and Zara bring their son Alfie home from hospital.
Zara and Jimmy get married in season 5 while she is giving birth to their second son, Patrick (named for Nina's dead partner).
In Season 6 Zara is a full-time medical student, and struggles to juggle the demands of family, study and marriage, particularly after Jimmy's taqueria is sold.
Adopted into a strict religious family with whom she had virtually nothing in common, Cherie thought that she was destined to be a loner in life.
A lesbian in a long-term relationship with girlfriend Renee, Kim fell pregnant via a sperm donation from Clegg and now juggles a career and caring for daughter, Stella.
Zoe Proudman-Reid, (portrayed by actresses Mia & Willow Sindle and Isabella Monaghan), was born in 2013 the day after her father's funeral.
Phil D'Arabont has a secret: he loves to dance and whips out some impressive moves at Kerry and half-brother Proudman's (not Ray) wedding celebrations at a pub in the middle of the day.
Patrick Reid (played by Matthew Le Nevez) is an anaesthetist who initially works with Nina at St Francis.
Leo Taylor (played by Patrick Brammall) and Nina first meet at the airport, and embark on an ultimately disastrous attempt to have a one-night stand.
His secret came out when a birth complication forced Thomas and his unknowing wife to Nina's hospital instead of the maternity ward they had planned.
Eloise Ward (played by Caren Pistorius) is a young obstetric registrar whose cool exterior masks a great deal of insecurity.
Joseph Green (played by Kevin Hofbauer) is introduced as a bicycle courier, who ultimately has a relationship with Kate Reid.
Susceptible to infatuation but desperately unsure what to do with it, Noonan's mid-seventies affair with Geraldine Proudman was one of the few times he threw caution into the wind, and was guided by his heart not his head.